# Relationship history for MSHA mine 1507357

Current hierarchy: **Williams Companies Inc → Mc Coy Elkhorn Coal Corp → No 5 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** General Energy Corp → No 5 Mine; 1950-01-01 to 1982-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Solid Fuel Company → No 5 Mine; 1974-01-01 to 1975-07-20; source msha-controller-operator-history
- **controller_controls_mine:** Merritt Jerry L → No 5 Mine; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Merritt Jerry L → Solid Fuel Company; 1974-01-01 to 1975-07-20; source msha-controller-operator-history
- **operator_operates_mine:** Mc Coy Elkhorn Coal Corp → No 5 Mine; 1975-07-21 to 1981-11-01; source msha-controller-operator-history
- **controller_controls_operator:** General Energy Corp → Mc Coy Elkhorn Coal Corp; 1975-07-21 to 1981-11-01; source msha-controller-operator-history
- **controller_controls_mine:** Mc Coy Hobert & Verlin → No 5 Mine; 1981-06-01 to 1984-07-01; source msha-controller-operator-history
- **operator_operates_mine:** D & M Coal Company Inc → No 5 Mine; 1981-11-02 to 1983-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Mc Coy Hobert & Verlin → D & M Coal Company Inc; 1981-11-02 to 1983-01-19; source msha-controller-operator-history
- **controller_controls_mine:** Williams Companies Inc → No 5 Mine; 1982-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mc Coy Elkhorn Coal Corp → No 5 Mine; 1983-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Williams Companies Inc → Mc Coy Elkhorn Coal Corp; 1983-01-20 to current/open; source msha-controller-operator-history